Spatial Sigma-Delta Modulation for Coarsely Quantized Massive MIMO Downlink: Flexible Designs by Convex Optimization [PDF]
IEEE Open Journal of Signal Processing, 2023 This article considers the context of multiuser massive MIMO downlink precoding with low-resolution digital-to-analog converters (DACs) at the transmitter. This subject is motivated by the consideration that it is expensive to employ high-resolution DACs
Wai-Yiu Keung, Wing-Kin Ma
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Computationally efficient low-power sigma delta modulation-based image processing algorithm
Mehran University Research Journal of Engineering and Technology, 2023 Digital Image Processing has dominated Digital Signal Processing at the cost of more memory, resources, and high computational power. In image processing, filtering transformations and other operations need complex multiplications, and the multiplier is ...
Aneela Pathan +3 more
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Bandpass Sigma–Delta Modulation: The Path toward RF-to-Digital Conversion in Software-Defined Radio
Chips, 2023 This paper reviews the state of the art on bandpass ΣΔ modulators (BP-ΣΔMs) intended to digitize radio frequency (RF) signals. A priori, this is the most direct way to implement software-defined radio (SDR) systems since the analog/digital interface is ...
Jose M. de la Rosa
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A Driving Technique for AC-AC Direct Matrix Converters Based on Sigma-Delta Modulation
Energies, 2019 Direct conversion of AC power between three-phase systems operating at different frequencies can be achieved using solid-state circuits known as matrix converters.
Simone Orcioni +3 more
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A novel approach toward optimized image processing using sigma delta modulation
Mehran University Research Journal of Engineering and TechnologyImage processing has widespread uses practically in every branch of science and arts. Processing images is more difficult than processing sound or data as there are more bits in the high pixel quality image.
Aneela Pathan +3 more
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Broad-spectrum antiviral activity of the sigma-1 receptor antagonist PB28 against coronaviruses [PDF]
Frontiers in MicrobiologyThe continuous evolution of coronaviruses poses persistent and severe threats to both human and animal health. While α- and β-coronaviruses mainly infect mammals, including humans, γ-coronaviruses predominantly infect poultry, causing substantial ...
Gaojie Song +10 more
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Multi-frequency Phase Laser Ranging based on Delta-Sigma Modulation
Guangtongxin yanjiu, 2022 In order to solve the problem that the laser satellite terminal can realize the ranging function while completing the communication function, this paper designs a method based on the Delta-Sigma modulation to realize the laser phase ranging, which can ...
Jin-xin ZUO +6 more
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Transmitting Data Through Reconfigurable Intelligent Surface: A Spatial Sigma-Delta Modulation Approach [PDF]
IEEE International Conference on Acoustics, Speech, and Signal Processing, 2023 Transmitting data using the phases on reconfigurable intelligent surfaces (RIS) is a promising solution for future energy-efficient communication systems.
Wai-Yiu Keung +2 more
semanticscholar +1 more source
Information, 2021 This work combines compressive sensing and short word-length techniques to achieve localization and target tracking in wireless sensor networks with energy-efficient communication between the network anchors and the fusion center.
Nuha A. S. Alwan, Zahir M. Hussain
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Optimal Design of Mobile Fronthaul Delta-Sigma Modulator based on Search Algorithm
Guangtongxin yanjiu, 2022 The Common Public Radio Interface (CPRI) used in mobile fronthaul has low spectrum efficiency. In this paper, we propose to use Delta-Sigma Modulation (DSM) technology as a new fronthaul interface.
WU Zi-qiang +3 more
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